For further information, please contact Yunus Emre KARA.

Age Annotations Dataset

The Age Annotations Dataset is a crowdsourced annotation dataset with known ground truth values, which is collected for the purpose of evaluating crowd-labeling methods. Apart from consensus estimation, this dataset can be used in a multitude of ways in machine learning and artificial intelligence research. If you use this dataset in your work, please cite the following article:
  • Kara, Yunus Emre
  • Genc, Gaye
  • Aran, Oya
  • Akarun, Lale
(2015). Modeling annotator behaviors for crowd labeling, Neurocomputing, 160, 141-156.


Collection of this dataset was funded by "Multimodal Computational Modeling of Nonverbal Social Behavior in Face to Face Interaction (SOBE), SNSF Ambizione Fellowship Project".

Download the dataset

Annotated Data (the FGNet Aging Database)

We asked the annotators to annotate the samples of the FGNet Aging Database* which consists of a total of 1002 pictures with known age values from 82 subjects. Some samples from the FGNet Aging Database:
The FGNet Aging Database samples.
The age range of the dataset is 0-69 and it consists mostly of baby, child, and young adult photos. The age histogram of the images in the FGNet Aging Database:
The FGNet Aging Database age histogram.

(*) Lanitis, A. (2008). Comparative evaluation of automatic age-progression methodologies. EURASIP Journal on Advances in Signal Processing, 2008, 101.

Annotation Task

For the annotation task, we prepared a questionnaire in which we show a facial picture and asked the annotator to rate the age of the person in the picture. The annotators were asked to rate the age from 1 to 7 where a lower rate means young and a higher rate means old. The following figure shows the annotation task instructions shown to the annotators:
Annotation task instructions shown to the annotators
Below is a sample of the questionnaire that the annotators saw:
Annotation task sample question
We used the CrowdFlower (rebranded as Appen) platform for collecting the annotation data and executed two sets of data collection. In the first set, a task for an annotator consisted of 10 annotations which means that the annotators were asked to annotate a batch of 10 images. In the second set, a batch consisted of 15 annotations. If the annotators desired, they could annotate more than one batch. In both sets, we set the system up to collect 5 annotations per sample.

Annotation statistics

The table below shows annotation counts for these two sets and their joint set. The table describes the frequency of annotators' annotations. For example, there are 208 annotators in Set 1 that have provided 10 annotations and there are 292 annotators in Set 2 that have provided 15 annotations. It can be seen that not all of the annotation counts per annotator are multiples of 10 or 15. This is because the system decides to collect fewer annotations when the "5 annotations per sample" criterion is met.
Annotator workloads (the number of annotations made by an annotator) for the dataset
Number of annotators
Set1 Set2 Joint
1 2 4 6
6 0 1 1
7 1 0 1
9 2 0 2
10 208 0 208
11 1 0 1
14 1 0 1
15 0 292 292
16 0 1 1
19 1 0 1
20 82 0 82
29 1 1 2
30 26 12 38
31 1 0 1
33 0 1 1
36 1 0 1
40 5 0 5
42 0 1 1
43 0 1 1
45 0 1 1
50 3 0 3
59 0 1 1


There are seven files in the archive:
  1. age_groundtruth.csv: Defines the groundtruth values for the samples. Each row of the file has semi-column separated ground truth values, respectively, as follows
    • sample id
    • the age of the person
    Age column has values in the 0-69 range.
    Sample rows from the file
  2. age_annotations.csv: Defines the annotations of the samples. Each row of the file has semi-column separated annotation values, respectively, as follows
    • id of the annotator of this annotation
    • id of the sample of this annotation
    • age annotation
    Age column has values in the 1-7 range.
    Sample rows from the file
    3056891 070A12.JPG1
  3. age_annotations_set1.csv: Similar to age_annotations.csv, but only for the first set
  4. age_annotations_set2.csv: Similar to age_annotations.csv, but only for the second set
  5. kara2015cl.pdf: The paper introducing this dataset
  6. kara2015cl.bib: BibTeX database for the above paper
  7. readme.txt: A copy of these descriptions